Fix Berry gpio.dac_voltage() broken in 13.2.0

[s-hadinger]

Description:

Fix Berry gpio.dac_voltage() that was broken in 13.2.0, in this commit: https://discord.com/channels/479389167382691863/490244847568158751/1173364184164077799

Checklist:

• The pull request is done against the latest development branch
• Only relevant files were touched
• Only one feature/fix was added per PR and the code change compiles without warnings
• The code change is tested and works with Tasmota core ESP8266 V.2.7.4.9
• The code change is tested and works with Tasmota core ESP32 V.2.0.14
• I accept the CLA.

NOTE: The code change must pass CI tests. Your PR cannot be merged unless tests pass